Fixed timeline

[VinayIN]

This pull request introduces significant changes to the podcast timeline and deployment model, improves the documentation, and simplifies the CLI interface. The most important changes are grouped below:

Timeline and Metadata Model Updates

• The timeline field now replaces the standalone citation field in podcast metadata. It supports a single ordered list mixing BibTeX citation files (by path) and existing news item IDs (integers), which are deployed in order as timeline_news rows. [1] [2] [3] [4]
• The code for deploying podcasts and timelines has been refactored to process this new timeline structure, ensuring correct order and linking, and removing the previous relationship resolution logic. [1] [2] [3]
• The citation field is now only used internally for backward compatibility, with all new relationships handled via timeline. [1] [2] [3]

CLI and User Interface Improvements

• The uninstall command has been simplified to remove the --force flag and now deletes both the CLI and local data. [1] [2] [3]
• The documentation for the interactive TUI has been expanded with updated key bindings, actions, and project structure details, making it easier for users to understand and navigate the interface. [1] [2] [3]

Documentation and Usability

• The README.md and CHANGELOG.md have been updated to reflect the new timeline model, authentication details, local database usage, and improved installation and command instructions. [1] [2] [3] [4]

Codebase Simplification

• Refactored deployment logic to remove unnecessary structs and streamline the process of deploying timelines and citation events. [1] [2] [3] [4]

These changes modernize the timeline and citation model, improve user experience, and clean up the deployment and CLI codebase.